<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org"
      xmlns:shiro="http://www.thymeleaf.org/thymeleaf-extras-shiro">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
<font color="red" th:text="${msg}"></font><br>
<div th:if="${session.loginUser==null}">
<form action="/login" method="post">
用户名：<input type="text" name="username"><br>
密码：<input type="text" name="password"><br>
    <input type="submit" value="登录">
</form></div>
</body>
</html>